OFFSET
0,3
PROG
(PARI) {a(n)=sum(k=0, n, if(k==0, 0^n, n^k*n!/(k-1)!* sum(i=0, n-1, (-1)^i*polcoeff(((exp(x+x*O(x^n))-1)^(k+i)), n)*binomial(2*i+k, i)/(2*i+k))))}
CROSSREFS
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jan 10 2008
STATUS
approved